Add stability to your Peterbilt 567/579 suspension with crossmembers & covers. Find essential, high-quality steel rear crossmembers, fiberglass rear frame covers, and walking beams ? all designed to provide a sturdy foundation and sleek look for your Peterbilt 567 or 579 model. With a focus on durability and style, these parts can help maintain your truck's performance and keep it looking its best. Whether you need to replace a damaged crossmember or upgrade your rear frame cover, this product line has top-notch Peterbilt-specific parts you can rely on.